After analyzing the carbon footprint generated by Korrika, Crespo explained that 69% of emissions occur as a result of transport, according to data from this year’s edition. According to the study, the largest landfill occurred on the day of closure, mainly due to agglomerations of people and displacements of vehicles and buses to the event.

The main responsibility for carbon emissions has been the thousands of participants who have met at the final ceremony and the use of fossil fuel vehicles. Transport has had a greater impact on the environment than other Korrika events. This was explained on Wednesday by Crespo in a presentation that took place at the bar Calderón in Bilbao.

The products for sale also generated 19% of the discharges, such as clothing or other products. It should be noted, however, that other factors have been excluded from the investigation: electricity, infrastructure assembly, water consumption, etc.

The organisers of the Korrika claim that research will contribute to the identification of sustainable actions and to the reduction of emissions. With the aim of reducing emissions, two proposals have been put forward: on the one hand, to optimise the use of transport and, on the other, to reduce the environmental impact of sales products. Organisers have emphasised that one of the values of Korrika is to "defend the protection of the environment" and will seek to reduce the activities against it.